Prime Factorisation – Index Form – Bingo Method Students should choose nine answers from the grid and place them randomly into a 3x3 square in their book. You may want to pause your display and choose questions according to difficulty during the game. Depending on time, students could win with a line, an X, or a ‘full house’ (all).

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Prime Factorisation in Index Form BINGO! 45 54 23 82 37 12 76 25 91 Prime Factorisation in Index Form

Choose your numbers… 22 x 7 24 x 3 23 x 11 22 x 5 22 x 52 22 x 3 x 7 Draw a 3x3 grid in your book.

Write 12 as a product of prime factors, in index form. 12 2 x 2 x 3 = 12 2 6 22 x 3 = 12 2 3

Write 30 as a product of prime factors, in index form. 30 2 x 3 x 5 = 30 2 15 3 5

Write 45 as a product of prime factors, in index form. 45 3 x 3 x 5 = 45 3 15 32 x 5 = 45 3 5

Write 36 as a product of prime factors, in index form. 36 2 x 2 x 3 x 3 = 36 2 18 22 x 32 = 36 2 9 3 3

Write 20 as a product of prime factors, in index form. 20 2 x 2 x 5 = 20 2 10 22 x 5 = 20 2 5

Write 28 as a product of prime factors, in index form. 28 2 x 2 x 7 = 28 2 14 22 x 7 = 28 2 7

Write 88 as a product of prime factors, in index form. 88 2 x 2 x 2 x 11 = 88 2 44 23 x 11 = 88 2 22 2 11

Write 48 as a product of prime factors, in index form. 48 2 x 2 x 2 x 2 x 3 = 48 2 24 24 x 3 = 48 2 12 2 6 2 3

Write 90 as a product of prime factors, in index form. 90 2 x 3 x 3 x 5 = 90 2 45 2 x 32 x 5 = 90 3 15 3 5

Write 24 as a product of prime factors, in index form. 24 2 x 2 x 2 x 3 = 24 2 12 23 x 3 = 24 2 6 2 3

Write 63 as a product of prime factors, in index form. 63 3 x 3 x 7 = 63 3 21 32 x 7 = 63 3 7

Write 100 as a product of prime factors, in index form. 100 2 x 2 x 5 x 5 = 100 2 50 22 x 52 = 100 2 25 5 5

Write 84 as a product of prime factors, in index form. 84 2 x 2 x 3 x 7 = 84 2 42 22 x 3 x 7 = 84 2 21 3 7

Write 54 as a product of prime factors, in index form. 54 2 x 3 x 3 x 3 = 54 2 27 2 x 33 = 54 3 9 3 3

Write 40 as a product of prime factors, in index form. 40 2 x 2 x 2 x 5 = 40 2 20 23 x 5 = 40 2 10 2 5

Write 108 as a product of prime factors, in index form. 108 2 x 2 x 3 x 3 x 3 = 108 2 54 22 x 33 = 108 2 27 3 9 3 3

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